US357360A - William - Google Patents

Description

(No'MddeL) WVG; BARNEY.

TELEPHONE RECEIVER.

Patented Feb. 8, 1887.

, TED TATES WILLIAM o. BARNEY, OF NEW YORK, N. Y., ASSIGNOR TO JOSIAH o. nnmr, l d or SAME PLACE.

TELEPHONE-RECEIVER.

EBPECIPICATION forming part of Letters Patent No. 357,360, dated February 8, 1887.

Application filed January 18, 1886. serial No. 188,814. (No model.)

, To all whom, it may concern: by a ring supported byseveral projections Be it known that 1, WILLIAM CHASE BAR- from the ring. The holder to which the ar- NEY, of the city and State of New York, have mature is attached may be a straight piece, or invented an Improvement in Telephone-Re may have the form ofa cross having three or i; 5 ceivers, of which the following is a speciiicafour arms. The ends of the arms of the cross 2 tiOnmay be curved, so that they will form, as it This invention relates to telephonereceivwere, legs to support the armature, their ends ers known as electromagnetic receivers. to rest loosely in cavities made in the ring at- I In order to avoid the sounds which are tached to the case of the magnet. i re emitted by a plate of iron when secured around In order to put the tympan out of condition its edge and submitted to the action of amagto produce its particular scale of harmonic net, I use for an armature a short thick piece sounds, I pierce it with holes irregularly of iron. This mass is secured to a very light placed and outside the portion thereof lying elastic support, in order that the support may over the coreof the magnet, thus leaving it to ;I5 offer very little resistance to the attraction of reproduce the words ofthe speaker without the magnet. I use for a tympan or soundihgalteration in quality or tone or in any=other board a thin sheet of wood, cardboard, cellurespect. loid, glass, horn, ivory, bone, cork, mica, vul- In the drawings, Figure 1 is a longitudinal l oanite, brass, or equivalent material. I find section of the telephonic receiver. Fig. 2 is a 7c 120 that when the tympan is inclosed in a case or separate elevation and side view of the armasounding-box the vibrations of the tympan ture and support. Fig. 3 is a detached edge produced by the varying attractive force of View and side view section of the birdseyethe magnet are injuriously affected. I find, maple tympan with holes in it. Fig. 4 is an also, that the passage of air-waves through 2. end view of the instrument. Fig. 5 is an edge 25 tube are more or less injuriously affected by view, and Fig. 6 is a side view, of the armathe vibrations of the sides of the tube. There ture-support in the form of a cross. fore my tympan is secured at its edge to a Arepresents the core of the magnet, which rigid support attached to the magnet, and there core may be permanently magnetized, and B is no substance whatever between the vibratory denotes the helix or coils of the same.

0 part of the tympan and the ear of thelistener. In order to intensify the action of one end of Sometimes a permanent magnet having a coil the magnet, the mass of soft iron 0 is attached surrounding it from end to end may be used, to the other pole thereof. Opposite the other 1 and in order to increase the magnetic force of pole thereof is the armature D, in the form of 1 the pole of the magnet in front of the armaa short thick piece of iron, as aforesaid, that 13 5 *ture I place a mass of soft iron against the is fastened to the elastic support E, which is other pole of the magnet. made as before stated, and sustains the armal, The armature is made of soft iron in the form ture in proximity to the pole of the magnet; of a short thickmass of iron of about the same but the support is free to move as the armadiameter as the end of the magnet, and its ture is vibrated by the variations in the mag- ;'40 length is about equal to its diameter. This netism. At the other side of the armaturearmature is attached to a thin piece of wood, support E there is a projection, F,that rests whalebone, vulcanite, brass, or equivalent maagainst the tympan G. This tympan will opterial. The ends of this armatureholder lie crate with the other parts, heretofore named, loosely in cavities made in a support attached when made of any suitable material; but I find 5 5 to the case of the magnet. On the opposite that a veneer of birds-eye maple is the best, side of the material supporting the armature because it has no tone of its own when vibratis a short spur,against which is held a tympan, ing, in consequence of the knotty nature of the of wood or equivalent material, clamped wood. around its edge between two rings attached to The edges of the tympan G are clamped bel5o the case of the magnet. The tympan is protween the rings H Iso as to be properly held, l l tected from coming into contact with the ear and one of these rings is formed upon or conneeted with the handle portion of the instrul piece of iron,and an elastic support, to which the armature is attached, and a permanent meat, that is composed of a case surrounding the eIectro-magnct. In the casing below the ring H several openings, 0, are made, so that the air is not confined upon either side of the i tynipan. ()ne way of making such openings is to form the upper part of the case with lugs or arms, the spaces between which form the openings when the ringH is in position. The ring I may be pressed against the side 01' the head and the ear; but I prefer to use projections L, that extend out from the ring I and limit the approach of the instrument to the ear.

The coil on the electro-magnet may extend from end to end thereof.

The holes in the tyinpan are shown in Figs. 3 and 4t.

I claim as my invcntion-' 1. The coinbinatioinina telephonic receiver, With an electrodnagnet, of an armature consist'ing of a short thick piece ofiron, and a free elastic support for the same, substantially as specified.

2. The co1nbination,in a telephonic receiver, i with an etectroniagnet having a mass of soft iron attached to one ot'its poles, of an armature in front of the other pole consisting of a short thick piece of iron, and a snpport,to which the same is attached, substantially as specified.

3. The combination of an ariinature capable of inductive action with a permanent magnet covered with a coil throughout its entire length, having a mass of soft iron in close contact with one end thereof, substantially as specified.

4. The combination,in atelephonio receiver,

of an armature consisting of a short thick magnet covered with a coil. throughout its entire length, and a mass of soft iron in close contact with one end thereof, substantially as set forth The combination, "with an electromagnet and armature composed of a short thick piece ofiron, of a tympa-n formed of a thin plate of wood, card-board, vuleanitemiea, brass, or equivalent material, substantially as set forth.

6. In a telephone receiver, the combination,

with a magnet and an armature, of an independent tylnpan having several holes pierced irregularly thercthrongh outside of the portion thereof lying over the core of themagnet, as and for the purposes set forth.

7. The combination, in a telephonic receiver having a magnet, an armature, and a tympan, of an open support for the armature and tympan, so that the air is not confined at either side of the tympan, substantially as specified.

S. The combination, with the magnet and armatnre,in a telephonic receiver,ofa tylnpan of birds-eye maple, for the purposes set forth.

9. The combinationavith a permanentmagnot having H is around the end or ends of said magne, of an armature consisting of a short thick piece of iron attached, to a free elastic support, substantially as specified.

Signed by me this 9th day of January, A. D. 1.886.

W. C. BARNEY.

\Vitnesses:

G120. T. PINCKNEY, \VALLACE L. SnnnnLL.

Images